🌍 The Puzzle Addressed:

A growing literature links firms' foreign direct investment (FDI) and trade to deeper global value chains and political outcomes, but most work focuses on FDI home countries and overlooks firm–product level interactions where those interdependencies actually arise. This study asks how firms' FDI reshapes host countries' trade profiles at the firm–product level and how those changes help form political coalitions for trade liberalization.

📊 What Was Analyzed: Global Greenfield FDI Since 2003

• Analysis uses global greenfield FDI project data covering projects since 2003.
• Across host countries, hosts experienced an average increase of over 45 export products in the year after investment.

🔗 How Firms Were Connected to Products: Linking FDI to Vietnamese Customs Records

• To overcome the challenge of matching firms to traded products, FDI project records were linked with detailed Vietnamese customs data.
• In Vietnam, export volumes of FDI-related products rose by 90% within four years of initial investments; import volumes of those products rose by 30% over the same period.

🔎 Key Findings

• Greenfield FDI expands the range of products exported from host markets at the firm–product level.
• Where firms and products are linked, FDI is associated with large increases in trade volumes (90% exports; 30% imports within four years in the Vietnamese case).
• Products tied to FDI projects received larger tariff cuts in bilateral free trade agreements, indicating privileged policy attention or stronger political backing for liberalization.

💡 Why This Matters:

These results show that outward-looking investments by foreign firms can reshape host-country trade profiles quickly and create concentrated economic interests that favor trade liberalization. By tracing effects at the firm–product level and documenting subsequent tariff outcomes in FTAs, the study identifies a concrete pathway through which FDI alters domestic political coalitions over trade.